Firmware Mtech 8803 -

You can only upgrade if Mobiletech or the motherboard manufacturer has officially mapped out an updated software stack for your device's specific chipset configuration. Attempting to force-flash a generic Android build without dedicated hardware abstraction layers (HALs) will permanently break peripheral support for features like the radio tuner, physical buttons, and steering wheel controls.

If the device won't boot, you must use a PC and a USB data cable. Firmware Mtech 8803